Fleetify nova conductor for N cells

This makes us start two levels of nova-conductor processes, and one per cell.

Change-Id: Ice4aceac5dc44954db3661480b9365f54e47a4c9
diff --git a/stack.sh b/stack.sh
index 6793d45..5148ae1 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1268,7 +1268,9 @@
 # Unable to use LUKS passphrase that is exactly 16 bytes long
 # https://bugzilla.redhat.com/show_bug.cgi?id=1447297
 if is_service_enabled nova; then
-    iniset $NOVA_CONF key_manager fixed_key $(generate_hex_string 36)
+    key=$(generate_hex_string 36)
+    iniset $NOVA_CONF key_manager fixed_key "$key"
+    iniset $NOVA_CPU_CONF key_manager fixed_key "$key"
 fi
 
 # Launch the nova-api and wait for it to answer before continuing